/*
**  Galapix - an image viewer for large image collections
**  Copyright (C) 2008 Ingo Ruhnke <grumbel@gmx.de>
**
**  This program is free software: you can redistribute it and/or modify
**  it under the terms of the GNU General Public License as published by
**  the Free Software Foundation, either version 3 of the License, or
**  (at your option) any later version.
**
**  This program is distributed in the hope that it will be useful,
**  but WITHOUT ANY WARRANTY; without even the implied warranty of
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**  GNU General Public License for more details.
**
**  You should have received a copy of the GNU General Public License
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef HEADER_GALAPIX_GALAPIX_TILE_CACHE_ID_HPP
#define HEADER_GALAPIX_GALAPIX_TILE_CACHE_ID_HPP

class TileCacheId
{
private:
  Vector2i m_pos;
  int      m_scale;

public:
  TileCacheId(const Vector2i& pos, int scale) :
    m_pos(pos),
    m_scale(scale)
  {}
  
  int get_scale() const { return m_scale; }
  Vector2i get_pos() const { return m_pos; }

  bool operator<(const TileCacheId& rhs) const
  {
    if (m_scale < rhs.m_scale)
    {
      return true;
    }
    else if (m_scale > rhs.m_scale)
    {
      return false;
    }
    else
    {
      if (m_pos.x < rhs.m_pos.x)
      {
        return true;
      }
      else if (m_pos.x > rhs.m_pos.x)
      {
        return false;
      }
      else
      {
        return m_pos.y < rhs.m_pos.y;
      }
    }
  }
};

#endif

/* EOF */
